Assuming a simple coherent rotation of the magnetization vector, formulas are proposed for the galvanomagnetic voltages parallel and perpendicular to the current as a function of the external magnetic field at various orientations of the easy axis. The theoretical discussion suggests several methods of measuring Hk, one of which is verified experimentally.
Thin films containing the Mn,Ge, intermetallic compound were obtained by a vacuum evaporation technique. The samples were divided into two groups. Films containing u p t o 60% Mn,Ge, belong to the first, those containing about 1 0 0~o belong to the second group. The temperature dependence of magnetization has been measured, and appeared to be similar t o those of bulk material, except for a small decrease in the Curie point. The perpendicular-to-surface anisotropy has been measured for group-I films. Its constant depends strongly on temperature and changes from positive values a t low temperatures to negative ones a t temperatures near the Curie point.Diinne Schichten der intermetallischen Verbindung Mn,Ge, wurden mit einer Aufdampfmethode im Vakuum erhalten. Die Proben wurden in zwei Gruppen eingeteilt.Schichten bis zu 60% Mn,Ge, gehoren zur ersten, solche mit etwa l OOyo zur zweiten Gruppe.Die Temperaturabhangigkeit der Magnetisierung wurde gemessen; sie scheint derjenigen von Volumenmaterial Bhnlich zu sein, mit Ausnahme eines kleinen Abfalls am Curiepankt. Die Anisotropie senkrecht zur Oberflache wurde fur Schichten der Gruppe I gemessen. Die Konstante hlngt stark von der Temperatur ab und andert sich von positiven Werten bei niedrigen Temperaturen zu negativen Werten bei Temperatwen in der Niihe des Curiepunktes.
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